diff --git a/hayabusa_report.css b/hayabusa_report.css
index 23f42df8..8133f2b0 100644
--- a/hayabusa_report.css
+++ b/hayabusa_report.css
@@ -4,7 +4,7 @@ h2 {
 }
 
 img#logo {
-    width: 50%;
+    width: 25%;
     display: block;
     margin-left: auto;
     margin-right: auto;